CVE-2024-26210
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on systems running Microsoft WDAC OLE DB provider for SQL Server. Attackers can exploit this by sending specially crafted requests to vulnerable systems, potentially gaining full control. Organizations using affected Microsoft SQL Server components are at risk.
💻 Affected Systems
- Microsoft SQL Server
- Microsoft WDAC OLE DB Provider
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining SYSTEM/administrator privileges, data exfiltration, ransomware deployment, and lateral movement across the network.
Likely Case
Remote code execution leading to data theft, credential harvesting, and installation of backdoors or malware on vulnerable servers.
If Mitigated
Limited impact with proper network segmentation, least privilege access, and security controls preventing successful exploitation.
🎯 Exploit Status
CVE-2024-26210 is a heap-based buffer overflow (CWE-122) that could be exploited remotely without authentication. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update for specific version numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26210
Restart Required: Yes
Instructions:
1. Apply the latest Microsoft security updates for SQL Server. 2. Restart affected systems. 3. Verify patch installation through Windows Update or SQL Server version check.
🔧 Temporary Workarounds
Network Segmentation
windowsRestrict network access to SQL Server instances to only trusted hosts and networks
Use Windows Firewall: New-NetFirewallRule -DisplayName "Block SQL Ports" -Direction Inbound -Protocol TCP -LocalPort 1433,1434 -Action Block
Disable Unnecessary Features
windowsDisable WDAC OLE DB provider if not required for business operations
SQL Server Configuration Manager: Disable OLE DB provider features
🧯 If You Can't Patch
- Implement strict network access controls and firewall rules to limit exposure
- Apply principle of least privilege to SQL Server service accounts and database permissions
🔍 How to Verify
Check if Vulnerable:
Check SQL Server version and compare against patched versions in Microsoft advisoryCheck Version:
SELECT @@VERSION; (in SQL Server Management Studio)Verify Fix Applied:
Verify Windows Update history shows SQL Server security updates installed and version matches patched release📡 Detection & Monitoring
Log Indicators:
- Unusual SQL Server error logs related to OLE DB provider
- Windows Event Logs showing unexpected process creation from SQL Server
Network Indicators:
- Unusual network traffic to SQL Server ports from unexpected sources
- Suspicious SQL queries attempting buffer overflow
SIEM Query:
source="Windows Security" EventID=4688 AND NewProcessName="*sql*" AND ParentProcessName="*sqlservr*"